Plug-in solar in the UK moved from a regulatory grey area to a legal, government-backed technology in the space of a few months in early 2026. If you have questions about how it works, whether it is right for your home, what the rules are, or how to actually get started, this page answers all of them in one place.
Use the section links to jump to what you need, or read through in order if you are starting from scratch.
- What plug-in solar is and how it works
- Legality and regulations
- Costs and savings
- Installation and setup
- Renters and flat dwellers
- Performance and output
- Products and buying
- Battery storage
- Practical and day to day
What plug-in solar is and how it works
What is a plug-in solar panel?
A plug-in solar system is a small self-contained solar setup that feeds electricity directly into your home through a standard socket. It consists of one or two solar panels, a microinverter that converts DC power from the panels into AC power your home can use, and a cable. Unlike rooftop solar, there is no scaffolding, no structural work and no permanent installation. You can take the whole system with you when you move.
What is another name for plug-in solar?
Plug-in solar goes by several names: balcony solar, plug-and-play solar, micro-solar, and the German term Balkonkraftwerk (balcony power station). They all refer to the same technology. In the UK the government and most retailers use the term plug-in solar.
What is in a typical plug-in solar kit?
A standard kit contains one or two solar panels (usually 400W monocrystalline), a microinverter, and a connection cable. Many kits include basic mounting hardware. Higher-end systems add a smart meter clamp or battery storage. For a full breakdown of components, see our guide to how plug-in solar kits work.
What does a microinverter do?
The microinverter converts the direct current (DC) electricity produced by your solar panels into alternating current (AC) that your home’s circuits use. It also synchronises with the existing electricity supply from the grid so the solar power blends seamlessly, and it includes anti-islanding protection that shuts the system down automatically if mains power fails.
How does the electricity get into my home?
The microinverter feeds AC electricity into your home’s ring main circuit through the connected socket. Any appliance running in your home draws from this combined supply first before pulling from the grid. If your panels generate more than your home is currently using, the surplus flows back to the grid. The whole process is automatic — there is nothing to switch on or manage.
Is plug-in solar the same as rooftop solar?
No. They both use the same photovoltaic technology, but rooftop solar is a permanently installed system wired directly into your consumer unit, typically 3.5 to 5kW, connected to the grid under MCS certification and eligible for Smart Export Guarantee payments. Plug-in solar is portable, limited to 800W, connects via a socket, and cannot currently access SEG payments. See our plug-in vs rooftop solar comparison for a full breakdown.
Why has plug-in solar become popular in the UK in 2026?
Three things came together at once: the government announced legalisation in March 2026, BS 7671 Amendment 4 updated the wiring regulations in April, and rising electricity prices have made any form of self-generation financially attractive. Germany already has over 1.5 million plug-in solar installations after legalising the technology in 2023, and the UK is following the same path.
Legality and regulations
Is plug-in solar legal in the UK?
Yes. Plug-in solar is legal in the UK as of 15 April 2026. BS 7671 Amendment 4, published by the IET and BSI, created the legal framework for plug-in solar systems in domestic properties. Systems up to 800W are permitted. Until the BSI product safety standard is published around July 2026, the fully compliant installation route requires a CPS-registered electrician. After July, certified DIY kits can be self-installed by plugging into a standard socket.
For the full regulatory picture, see our UK plug-in solar rules and regulations page.
What is BS 7671 Amendment 4?
BS 7671 Amendment 4 is the April 2026 update to the UK wiring regulations that legalised plug-in solar. Published on 15 April 2026, it introduced Chapter 708 covering small plug-in generator systems connected to a domestic supply. Key provisions: systems must not exceed 800W, the microinverter must include anti-islanding protection, and the connected circuit must have Type A RCD protection. The transition period ends 15 October 2026.
What is the BSI product standard and when does it arrive?
The BSI product standard is a separate certification being developed by the British Standards Institution that defines what a compliant plug-in solar product must look like — microinverter specs, socket connection safety, testing and labelling. It is expected around July 2026. Once published, kits certified to this standard can be legally self-installed by plugging into a standard 13A socket with no electrician required.
Do I need planning permission for plug-in solar?
No. Plug-in solar panels are treated as temporary or removable installations and do not require planning permission in England. If you live in a listed building or conservation area, check with your local planning authority. For the vast majority of UK homes, no planning application is required.
What is the maximum output allowed?
800W. This is the safe threshold for a standard UK ring main circuit and the limit set under BS 7671 Amendment 4. A typical 800W kit uses two 400W panels. There is no minimum — a single 400W panel is perfectly legal.
What is the G98 notification?
G98 is the engineering recommendation that requires you to notify your local Distribution Network Operator before connecting a plug-in solar system. The notification is free, takes around 15 minutes online, and does not require approval — you submit the form and keep the confirmation. You have up to 28 days after connection to complete it, though submitting before or on the day of installation is best practice. Find your DNO at Energy Networks Association. Our G98 guide explains the full process.
What is a DNO?
A Distribution Network Operator is the company that manages the electricity distribution network in your area. It is not the same as your energy supplier. There are six main DNOs in Great Britain covering different geographic regions. Your DNO is the organisation you notify under G98 before connecting your system.
What is the October 2026 deadline?
15 October 2026 is when the transition period for BS 7671 Amendment 4 ends. After that date, all new electrical installation work must fully comply with the updated wiring regulations. This does not affect systems already installed and notified before October.
Do I need to tell my energy supplier?
No. The G98 notification goes to your DNO, not your energy supplier. You do not need to inform your energy supplier to install a plug-in solar system, though if you later want to set up a Smart Export Guarantee arrangement (which plug-in systems currently cannot access), you would contact your supplier at that point.
Does plug-in solar affect my home insurance?
Possibly. Most home insurance policies do not automatically cover solar installations. Notify your insurer before connecting a plug-in system. Many insurers treat portable systems as contents rather than a structural change, and any additional premium is usually minimal. Check your policy documents and contact your insurer if in doubt.
Does VAT apply to plug-in solar kits?
Yes. The 0% VAT rate that applies to professionally installed rooftop solar does not cover plug-in kits purchased for self-installation. You pay the standard 20% VAT rate. This is worth factoring into your cost comparison with rooftop solar, which benefits from zero VAT on supply and installation until at least March 2027.
What RCD type do I need?
BS 7671 Amendment 4 requires Type A RCD protection on any circuit with a plug-in solar system connected. Most consumer units installed in the last 15 years already contain Type A RCDs. Older properties may have Type AC RCDs, which were not designed for bidirectional power flow. Our article on consumer unit and RCD checks explains what to look for before you buy.
Costs and savings
How much does a plug-in solar kit cost in the UK?
A single 400W panel with microinverter costs around £150 to £400. A full 800W two-panel system costs £400 to £600. Battery-integrated systems start at around £979. Mounting hardware such as balcony brackets or ground frames adds £40 to £80. Prices are expected to become more competitive when Lidl and Iceland launch their retail ranges after the BSI standard publishes. Our Best Kits of 2026 page has current pricing across the main products.
How much can I save per year?
Between £100 and £180 per year for a well-positioned south-facing 800W system in central England, based on the Ofgem April 2026 price cap of 27.69p/kWh. The government’s estimate is up to £110 per year. With battery storage and a time-of-use tariff like Octopus Go, annual savings can reach £220 to £280. Use our savings calculator for a personalised estimate based on your region and panel position.
How long until the kit pays for itself?
Three to five years for a panel-only system; five to nine years for a battery-integrated system. After payback, the electricity your panels generate costs nothing for the remaining 15 to 20 years of the system’s life. See our detailed savings guide for a full breakdown of how the numbers work.
What is the 20-year return on plug-in solar?
A south-facing 800W system saving £140 per year over 20 years generates £2,800 in total electricity savings, minus the kit cost of around £500, giving a net return of roughly £2,300. Higher savings from a time-of-use tariff or battery storage improve this further. Electricity prices are expected to remain above 2024 levels for the foreseeable future, which benefits the long-term return.
Can I earn money by exporting surplus electricity?
Not currently. Plug-in solar systems cannot achieve MCS certification, which is required to register for Smart Export Guarantee (SEG) payments. Any surplus electricity flows back to the grid without payment. This makes self-consumption the priority — the more of your own solar electricity you use directly, the better your financial return.
Does the electricity rate affect my saving?
Yes significantly. Every 1p increase in the unit rate increases your annual saving by around £4 to £6 for an 800W system. At 27.69p/kWh (April 2026 cap) a well-positioned south-facing system saves around £140. If rates rise to 30p, the same system saves around £150. Checking the current Ofgem price cap rate before calculating your return gives the most accurate figure.
Is plug-in solar worth it if I rent?
Yes, often. Plug-in solar is portable — you take it with you when you move. The payback period of three to five years is achievable even if you move after two years, since you reinstall the same kit at your next home and continue saving. The system does not depreciate significantly and works in any south-facing position. See our renters guide for the full picture.
Installation and setup
Do I need an electrician to install plug-in solar?
Until the BSI product standard is published around July 2026, yes. A CPS-registered electrician should make the final electrical connection. After July, certified DIY kits can be connected by plugging into a standard 13A socket without professional help. The physical panel mounting — attaching panels to a frame, railing or wall — does not require an electrician at any stage and can be done by any competent person or a local roofer.
Why is it so hard to find a solar installer for a small DIY job?
Most solar installation companies operate on a supply-and-install model where their margin comes from supplying the whole system, not just fitting your panels. A small labour-only job using kit you have already bought is commercially unattractive to most established solar companies. The installer market is also at full capacity in many parts of the UK following record installation numbers in early 2026. Our article on finding a plug-in solar installer covers the best practical workarounds, including going directly to local roofers and grouping jobs with neighbours.
Can a roofer install my plug-in solar panels?
Yes, for the physical mounting. The National Careers Service confirms that qualified roofers can take solar PV training to fit panels to buildings. Many solar companies already subcontract roof mounting to local roofers anyway. A roofer handles the brackets, frame and physical panel positioning; a separate registered electrician makes the electrical connection. Going direct to a roofer cuts out the middleman and often gets the job done faster and more cheaply.
How long does installation take?
Mounting the panels takes one to two hours for a standard balcony railing or ground-mounted setup. The electrical connection adds another hour. A full installation from unpacking to first generation is typically a half-day job.
Where should I put my panels?
South-facing is the single most important factor. The closer to 35 to 40 degrees of tilt, the better the output. Common positions are a south-facing balcony railing (vertical mount), a garden ground-mounted frame, a shed or flat roof, or a wall bracket. Our balcony vs garden solar guide compares each setup in detail.
How do I complete the G98 notification?
Find your DNO using your postcode at Energy Networks Association, then go to their website and complete the G98 online form. You need the make and model of your microinverter and its maximum output in watts. Keep the confirmation. Some kit suppliers handle G98 on your behalf — check whether yours does. Our G98 notification guide walks through the process step by step.
What is the Getting Started process from start to finish?
Check your outdoor space is suitable, estimate your saving using the calculator, choose a kit, notify your DNO, mount the panels, arrange the electrical connection, and monitor your generation. Our Getting Started guide covers every step in order.
Renters and flat dwellers
Can renters install plug-in solar in the UK?
Yes, with landlord permission. Even though plug-in solar is portable and leaves no permanent mark, most tenancy agreements require written permission for external fixtures. The Renters Rights Act 2025 provides a framework under which landlords cannot unreasonably refuse reasonable home improvement requests. A removable solar system is a strong candidate for approval. Climate Minister Katie White has said the government will consider law changes if landlord refusals become a significant problem. Full details are in our renters and plug-in solar guide.
What if my landlord refuses?
Ask for written grounds for refusal. Aesthetic preference alone is not generally considered reasonable grounds. If you reach an impasse, Citizens Advice can advise on your rights under the Renters Rights Act 2025. The Private Rented Sector Ombudsman is also an escalation route if informal resolution fails.
Can I install plug-in solar if I live in a flat?
Yes, if you have a south-facing balcony, terrace or outdoor space within cable distance of a socket. Balcony panels on railing mounts are the most common flat-dwelling setup. Leaseholders may also need consent from their freeholder or building management company in addition to their landlord — check your lease agreement before buying a kit.
Is plug-in solar suitable for a rented flat with a north-facing balcony?
No. North-facing positions produce insufficient output to justify the cost of a kit in the UK. East or west-facing balconies produce 60 to 70 percent of optimal south-facing output and are worth considering. If your only outdoor space faces north, plug-in solar is unlikely to give you a worthwhile return. Our winter performance guide explains in detail why orientation matters so much.
Can I take my plug-in solar system when I move?
Yes. That is one of the main advantages over rooftop solar. The whole system unplugs, unmounts and reinstalls at your next home. Nothing is left behind and the investment travels with you.
Does leaseholder solar work differently from renter solar?
The key difference is that leaseholders may need consent from both their landlord and their freeholder or residents management company, depending on what the lease allows. The freeholder may also have the right to charge an administration fee. Check your specific lease agreement before purchasing equipment.
Performance and output
How much electricity does an 800W plug-in system generate per year?
Around 500 to 700 kWh per year for a south-facing system at 35 to 40 degrees tilt in central England. South East England sees 630 to 750 kWh. Scotland typically sees 400 to 520 kWh. East or west-facing systems generate 60 to 70 percent of these figures. Use the savings calculator for region-specific estimates.
Does plug-in solar work in cloudy weather?
Yes. Solar panels generate electricity from daylight, not direct sunshine. On an overcast day you get roughly 10 to 25 percent of clear-sky output. The UK’s annual solar resource — comparable to Germany, which has 1.5 million plug-in solar installations — is sufficient to make the investment worthwhile even accounting for typical UK cloud cover.
Does cold weather affect solar panel output?
Cold temperatures actually slightly improve photovoltaic efficiency. Solar panels perform better in cold conditions than in heat. What winter reduces is daylight hours and the angle at which sunlight reaches the panels, not their efficiency in the available light. A cold, bright January day can outperform a warm, hazy summer afternoon.
Does plug-in solar work in UK winter?
Yes, though at significantly reduced output. A well-positioned south-facing 800W system generates roughly 90 to 150 kWh from November to February — around 15 to 25 percent of annual generation. Panel placement matters more in winter than summer: south-facing orientation and a tilt of 35 to 40 degrees make a much bigger difference in winter, when the sun stays low. Our winter performance article covers this in detail.
What is the seasonal variation in UK plug-in solar output?
Output varies roughly four to one between the best and worst months. May, June and July consistently produce the most, with around 119 kWh per installed kilowatt. December produces around 29 kWh per kilowatt. April to September accounts for 70 to 80 percent of annual generation. The monthly bar chart in the savings calculator shows this pattern visually for your region.
How does panel orientation affect output?
South-facing panels at 35 to 40 degrees produce maximum output. East or west-facing panels produce roughly 60 to 70 percent of optimal — less in winter when the sun stays south. Vertical panels (as on a balcony railing) produce about 70 percent of optimally tilted output in annual terms, but perform relatively better in winter when the sun is low. North-facing positions are not viable in the UK.
Does shading affect plug-in solar output?
Yes, significantly. Trees, walls, buildings or overhangs that shade your panels reduce output in proportion to how long and how completely they shade the panel. Winter shadows are much longer than summer ones — check your intended panel position in winter daylight conditions before finalising placement. Microinverters handle partial shading better than string inverters because each panel operates independently.
How do UK solar resources compare to Germany?
The UK’s solar resource is comparable to northern Germany, which already has over 1.5 million plug-in solar installations and counting. London receives around 760 kWh per year from a well-positioned 800W system; Edinburgh around 700 kWh. These figures are more than sufficient for a positive financial return.
Does snow affect plug-in solar panels?
Snow only affects output if it covers the panels completely. Below minus 3 degrees Celsius, snow may stick to panels, but panel heat typically melts light snow accumulation, even overnight. Heavy snowfall that fully covers panels will stop generation until cleared. In most parts of the UK, significant snow accumulation is rare enough not to meaningfully affect annual generation totals.
Do I need to clean my panels?
Panels in most UK locations are largely self-cleaning — rain does most of the work. An annual clean is worth doing to remove accumulated dust and bird droppings. If you live near the sea, farmland or a mine, clean two or three times per year. Plug-in panels have the advantage of being accessible and easy to clean compared to rooftop installations.
Products and buying
What is the EcoFlow STREAM?
The EcoFlow STREAM is EcoFlow’s entry-level plug-in solar kit, and the product most closely associated with the UK government rollout. A full 800W two-panel kit costs around £499. It supports battery expansion using EcoFlow’s modular battery range. The STREAM is almost certainly the product that will appear on Lidl and Iceland shelves once BSI certification is complete. Our EcoFlow comparison guide covers the STREAM against the more advanced PowerStream.
What is the difference between the EcoFlow STREAM and PowerStream?
The STREAM is a simpler, more affordable system designed for straightforward plug-in generation. The PowerStream is a more capable system that connects to your smart meter and adjusts output in real time to match your actual electricity consumption, increasing self-consumption and reducing surplus lost to the grid. The PowerStream suits higher-consumption households and those pairing solar with a time-of-use tariff. See our full comparison.
What brands make plug-in solar microinverters?
The main brands available in the UK are EcoFlow (STREAM and PowerStream), Hoymiles, Anker (SOLIX RS40P) and Zendure. Hoymiles is the most widely used brand in European balcony solar installations and offers a ten-year microinverter warranty. EcoFlow offers five years. Anker SOLIX offers twelve years. See our Best Kits of 2026 page for a full comparison.
What should I check before buying any kit?
Check for CE or UKCA marking on the microinverter, G98 compliance in the product documentation, an 800W or lower output rating, anti-islanding protection, a 25-year panel performance warranty and at least ten years on the microinverter. After July 2026, also look for kits certified to the new BSI product standard for the simplest compliant self-install route.
Can I buy panels from City Plumbing for a plug-in solar setup?
Yes. City Plumbing stocks trade-quality solar panels suitable for plug-in systems and is one of the more reliable sources for panels given current supply constraints. You would need to pair them with a separately purchased microinverter from EcoFlow, Hoymiles or another compliant brand. As the founder of this site found when navigating his own installation, sourcing panels and inverter separately can be a practical alternative when bundled kits have stock delays.
Should I buy now or wait for Lidl?
The main cost of waiting is foregone summer generation. A well-positioned 800W system saves £15 to £20 per month in good conditions from April to September. If Lidl undercuts current prices by £100 to £150 and you wait four months, the electricity saving you missed roughly covers the price difference. Our buy now vs wait guide works through the calculation in detail.
Are there supply issues with plug-in solar products in the UK?
Yes. China removed its solar panel export rebate on 1 April 2026, pushing component costs up across the supply chain. Demand has also spiked following the government announcement in March. EcoFlow in particular has experienced panel stock delays, as documented in our first-hand experience article. eBay and specialist retailers may have stock where direct brand websites do not.
Battery storage
Should I add battery storage to my plug-in solar system?
It depends on your electricity usage pattern. If you are mostly out during the day, a battery captures surplus generation that would otherwise flow unpaid to the grid. If you are home during the day and use electricity when the panels are generating, a battery adds less value. Our battery storage guide works through the financial case for different household types.
How much does a battery-integrated plug-in solar system cost?
The EcoFlow STREAM with battery storage starts at around £979. Higher-capacity configurations cost more. The additional saving from battery storage over a panel-only setup is typically £80 to £150 per year depending on household usage, giving a payback period on the battery element of five to nine years.
What is the benefit of pairing a battery with Octopus Go?
Octopus Go offers a significantly cheaper overnight electricity rate compared to the standard daytime rate. A battery charged on cheap overnight electricity and discharged during expensive peak periods, combined with daytime solar generation, can increase annual savings to £220 to £280 compared to £100 to £180 for a panel-only system on a standard tariff. Our Octopus Go and plug-in solar guide explains how to set this up.
Does a battery help in winter?
Yes. Winter daytime generation is lower but household electricity demand is higher, particularly in the evening. A battery stores any surplus winter daytime generation for evening use and can also be charged on cheap overnight electricity from the grid to cover peak evening demand. This makes the winter financial case for battery storage stronger than it might initially appear.
Practical and day to day
Do plug-in solar panels work in a power cut?
No. Standard plug-in solar systems shut down automatically when mains power fails. This is mandatory anti-islanding protection that prevents electricity feeding into grid cables being worked on by engineers. Some battery-integrated systems can switch to off-grid mode and power specific appliances from the battery during a power cut. Our power cut article explains the options.
Is there anything to switch on or manage day to day?
No. Once connected, the system works automatically whenever there is daylight. Most kits include a companion app that shows real-time and historical generation data, which is useful for understanding your output patterns but not required for the system to operate.
How long do the panels last?
Solar panels typically carry a 25-year performance warranty guaranteeing at least 80 percent of rated output at the end of that period. Panel degradation is around 0.3 to 0.5 percent per year — very slow. The microinverter is the component more likely to need replacing during the system’s life: EcoFlow offers five years, Hoymiles and Anker offer ten to twelve years. Replacement microinverters cost £60 to £120.
Does plug-in solar work with a smart meter?
Yes. Your smart meter will record lower consumption during the hours your panels are generating, which is reflected in your bill. Some more advanced systems like the EcoFlow PowerStream connect directly to your smart meter clamp to optimise output in real time. Standard STREAM and panel-only setups work perfectly well without any smart meter integration.
What happens to surplus electricity I generate?
Surplus electricity that your home is not currently consuming flows back to the grid. Without a Smart Export Guarantee arrangement — which plug-in systems currently cannot access — this surplus flows unpaid. Maximising self-consumption (using electricity when your panels are generating) and adding battery storage are the main ways to reduce surplus loss.
Does plug-in solar reduce my carbon footprint?
Yes. Each 400W panel generating around 350 kWh per year displaces electricity that would otherwise have been generated partly from gas and other fossil fuels. The carbon saving is roughly 150 to 200 kg of CO2 per panel per year, based on the UK grid’s average carbon intensity. Over 20 years, a two-panel 800W system avoids around 6 to 8 tonnes of CO2 emissions.
What is the Future Homes Standard and how does it relate to plug-in solar?
The Future Homes Standard came into force on 24 March 2026 and requires new homes in England to be built with low-carbon heating and on-site renewable generation, typically rooftop solar. For flat developments where individual rooftop solar is not feasible, plug-in solar is identified as an alternative generation route. Our Future Homes Standard article covers what the new regulations mean for buyers of new build properties.
What did Germany’s plug-in solar rollout teach the UK?
Germany legalised balcony solar in 2023 and registered over 426,000 new installations in 2025 alone. The key lessons: once certified products reach mainstream retailers the market grows rapidly, the biggest beneficiary is renters and flat-dwellers who previously had no solar option, price competition between retailers drives costs down quickly, and the installer friction the UK is currently experiencing is temporary. Our article on Germany’s plug-in solar experience covers the full story.
This guide is updated as regulations and product availability develop. Last updated May 2026. If you have a question that is not covered here, use the contact form on the Work With Us page and we will add it.